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RCBO tripping

Anthony Smith over 1 year ago

RBCO trips when I switch off circuit, can only reset by closing light switch, circuit has been working normally, suspect condensation but still odd

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0 mapj1 over 1 year ago

Does it still trip with the lamps taken out? It may be a scratchy light switch - some RCD/RCBO do not appreciate multiple sharp edges, better ones filter that out.

can you clarify "can only reset by closing light switch" do you mean with switch in 'off' position it never resets? If so, a very long shot, but for the 2 mins it takes, just take the switch off and see what is behind- at least one thoughtless decorator used the 'spare' terminal of a 2 way switch wired as a single way, as a handy terminal to park a flapping cpc. Maybe he has visited there as well...
Mike.
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0 mapj1 over 1 year ago

Does it still trip with the lamps taken out? It may be a scratchy light switch - some RCD/RCBO do not appreciate multiple sharp edges, better ones filter that out.

can you clarify "can only reset by closing light switch" do you mean with switch in 'off' position it never resets? If so, a very long shot, but for the 2 mins it takes, just take the switch off and see what is behind- at least one thoughtless decorator used the 'spare' terminal of a 2 way switch wired as a single way, as a handy terminal to park a flapping cpc. Maybe he has visited there as well...
Mike.
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